@article{02121243,
title = {Sufficient conditions for elliptic problem of optimal control in },
journal = {Matematichki Vesnik},
volume = {55},
year = {2003},
pages = {107-119},
zbl = {1052.49024},
language = {en},
url = {http://dml.mathdoc.fr/item/02121243}
}
Lahrech, S.; Addou, A. Sufficient conditions for elliptic problem of optimal control in . Matematichki Vesnik, Tome 55 (2003) pp. 107-119. http://gdmltest.u-ga.fr/item/02121243/